EMC2 with parallel robot

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07 Oct 2010 03:12 #4550 by cotona
Hi guys, I'm making a project at college with parallel cinematic.
I'm using EMC2 to generate the angles of the motors with the inverse cinematic. It is working fine.

But now I need to read a file that have the G-code with the coordinates where I want my tool to go and I'm not finding a way how to read this file with the EMC2.

Someone that knows could please tell me the way?

Sincerally,
Gabriel Probst.

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07 Oct 2010 12:36 #4558 by BigJohnT
The simple way is to just write your g-code by hand otherwise you need cam software to convert your drawings to g-code (usually not free). If you have a list of coordinates you can just copy and paste them in the g-code file after the first G0 or G1 for linear moves.

John

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07 Oct 2010 13:56 #4563 by cotona
Replied by cotona on topic Re:EMC2 with parallel robot
Hi John, and thank you for answering.
I don't have a drawing. Here is what I do have.

My project is to get objects from a mat. I'll locate the objects with a Software that I have made and write the G-code with this software in a file. My problem is how to do EMC2 reading this file that I have created.

I will also need to update this file every 10 second for exemple to implement new coordinates. Can I do that with EMC2 ? Will It let me use a file while it's using for reading coordinates ?

Sincerally,
Gabriel Probsy.

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07 Oct 2010 23:13 #4576 by BigJohnT
You can send a g-code file directly to Axis. You might also explore using variables and M100. If you know TCL take a look at the program in the subroutines section or look at my simple g code generators on the wiki for info on how to send a g-code file to Axis.

Sounds like an interesting project, keep us posted on your progress.

John

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12 Oct 2010 16:11 #4644 by andypugh
cotona wrote:

My project is to get objects from a mat. I'll locate the objects with a Software that I have made and write the G-code with this software in a file. My problem is how to do EMC2 reading this file that I have created.


You might want to consider bypassing the G-code file, and using emcrsh to send the movement commands. (But I confess I know nothing at all about it)
wiki.linuxcnc.org/emcinfo.pl?Emcrsh

I will also need to update this file every 10 second for exemple to implement new coordinates. Can I do that with EMC2 ? Will It let me use a file while it's using for reading coordinates ?


One thing that might work (but it is horrible :-) is this

#1 = 1
O100 WHILE [#1 > 0]
O<filename> CALL
O100 END WHILE

Then you ought to be able to write G-code to a file called "filename.ngc" in the PROGRAM_PREFIX directory, and see EMC act on it. (set #1 to 0 in this file to end it).

This is not tested, I am not even sure that you end a WHILE with END WHILE in EMC2 G-Code...

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